Relay.



PATENTED APR. 30, 1907.

B. F. BLISS.

RELAY.

APPLIOATION FILED AUG.17, 1906.

INVENTUR ELMERE Buss.

\A/iTNESSES U IT D STATES PATENT orrion.

ELMER r. BLISS, or sonENEoTAnY, NEW roan, ASSIGNOR TOGENERAL ELECTRIC COMPANY, A CORPORATION or NEW YORK...

RELAY.

Specification of Letters Patent.

Patented April 80, 1907.

Applicationfiled Aug11stl.'7, 1906. Serial No. 331,002.

.block-signal systems, .and its object is to ar- I '10 range such relays so that the number 01' turns in the track winding may be adjusted in a simple manner. It is desirable that all the track relays in a block-signal system should be identical in construction; but if 15 the length of the blocks varies greatly, it-is also desirable that the number of turns in the track winding oi" the relay should vary for (li'll'erent lengths of block,particularly if alternatin-g-current is used for the signal 20 circuits. Since with alternating-current the impedance of the rails is comparatively high, so that the diil'erence in impedance between a short and a 'long'block is comparatively great. Identity of construction of therelays,

2 5 and at the same time a proper proportioning oi the number of turns of the relay winding for the length of block may be obtained if the number of turns in the trackwinding is made adjustable. By my invention this adjust- 3 ment of the number oi turns may be obtained without the use of flexible leads and with a minimum number of leads and cont acts.

My invention consists in bringing leads 35 from the terminals and from intermediate points of the track winding on the relay and connecting these leads to contacts arranged on two intersecting arcs, and providing two movable contacts arranged to move over the I 4 'two arcs, respectively. The number of turns'between each pair of ad acent leads is.

preferably diil'erent from that between any other pair. This arrangement, as will appear from the following description, gives a 45 great number of adjustments with a very small number-of leads and contacts.

The adjustment of the relay winding should preferably be made before the relays are installed, and should not be altered by 5 the inspector in charge of the relay. Consequently, the contacts and leads, as above described, are preferably arranged within the casing of the relay and the pivoted contacts connected to binding posts outside the easreterence to the accompanying drawing, in

threading the disk on opposite sides oi the flux produced by the track winding E. These ing. The casing may then be sealed after the proper adjustment has been made, and tampering ol the adjustment thereby prevented.

My invention will best he understood by which Figure I shows a plan. view of a relay arranged in accordance with my invention; and Fig. 2 is a diagram of the connection.

ln-Fig. 1, A represents the supporting base of insulating material, on which is mounted the cover B, which is showh in cross-section in Fig. l, which is preferably of glass, and whichforms', together with the base, a'casing for all the moving parts oi the relay. I have illustrated a relay of the twophase induc- 1 tion type, since my invention is particularly advantageous in connection with alternatingcurrent rel ays but it will be understood that my invention is not limited to this particular type of relay. 0 represents a 'pivoted conducting disk carrying the movable contacts D D. 1*] represents the track winding of the relay, which is mounted on. a laminated magnetic core F, the poles oi which extend close to the disk (1 on the opposite sides of the disk. G G- represent coils, which are supplied independently of the track circuit with current displaced ninety degrees in phase from the current flowing through the track winding E. "The coils G G are mount ed on. laminated cores H, the poles of which face each other on. opposite sides of the poles of the.- core F, so as to produce two fluxes two fluxes being ninety degrees out olfphase produce a torque on the disk in the Wellknown manner. The connections of the two-phase relay, above described, are well 5 understoodin the art, and form no part-of my invention. The track winding E is provided with leads 6, both from its terminals and from intermediate points. To these leads -ardroo connected contacts I to 1 which are arranged'on two intersecting ares, asclearly shown in Fig. 2. Two pivoted cont-act'sU J are arranged to move over the two arcs, re

spectively, and are connected to binding- 10.

posts K K outside the casing. Thenumber of turns between each pair of ad acent leads 6 preferably drlt'ers from-that between any other pair, 'as indicated in Fig. 2. For instance, if the track coil contains 360 turns, as indicated in the figure, one lead may be brought out 120- 'turns from one end, and the 5 other lead 160 turns from the other end.

l i ith such an arrangement six different adjustments may be obtained with the four leads and two movable contacts shown. For instance, if contact J engages contact I 10 and contact J engages contact I the'entire 360 turns of the track coil will be connected between the binding-posts K K. Now, if contacts J is moved to contact I and contact J is moved to contact I 240 turns will b included in circuit if contact J is moved back to contact I? and contact J is moved. to con act I, 200 turns will be included in circuit; ii'contact J is moved to contact I and contact J back to contact I", 160 turns 2o will be in circuit; if contact J is on contact I what I claim asnew and Patent of the United States, 1s, fl. I relay, a Winding having leads from tez nnals and from intermediate points, I. arranged on two, intersecting arcs cted to said leads,

I l d two pivoted con- 5 v tacts adapted to move over the two arcs re spectively. 1

2. In a relay, a winding havin leads from its terminals and from interme 'atc points, the number of turns between each air of adjacent leads being difl'erent from t at be- I tween any other pair, contacts arranged on two intersecting arcs connectedto said leads, and two pivoted contacts adapted to move over the two arcs respectively.

3. In a relay, a casing, a winding'therein having leads from itsterminals and from intermediate points, contacts within the casing arranged on'twointersecting arcs and connected to said leads, two. pivoted contacts within the casing adapted to move over the two. arcs respectively," and bindingposts' outside the casing connected to said pivoted contacts.

4. In a relay, a casing, a Winding therein having" leads from its terminals and -from' intermediate points, the number of turns between each' pair of adjacent leads being different from that between any other pair, contacts within the casingarranged on two intersecting arcs and connected to said leads, two pivoted contacts within the casing ad apted to move over the two arcs respectively, and binding-posts outside the casing-connected to said pivoted contacts.

In witness whereof, I have hereunto set my hand this 16th day of August, 1906'.

ELIMIER F. BLISS. V7 i tnesses' i ,B. HULL,

BERTHA 111 40011. 

